Roll third_party/externals/swiftshader f8374cf0e75c..c4bd9df2de2c (2 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/f8374cf0e75c..c4bd9df2de2c


git log f8374cf0e75c..c4bd9df2de2c --date=short --no-merges --format='%ad %ae %s'
2018-12-07 sugoi@google.com Implement waiting for fences as noop
2018-12-07 sugoi@google.com Implement pipeline barrier as noop


Created with:
  gclient setdep -r third_party/externals/swiftshader@c4bd9df2de2c

The AutoRoll server is located here: https://autoroll.skia.org/r/swiftshader-skia-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

CQ_INCLUDE_TRYBOTS=skia.primary:Test-Debian9-Clang-GCE-GPU-SwiftShader-x86_64-Debug-All-SwiftShader
TBR=jcgregorio@google.com

Change-Id: I0c9d7dfb67932d6c50a286ce009dba0e6c22a441
Reviewed-on: https://skia-review.googlesource.com/c/175786
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
1 file changed